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has anyone tried this? sounds interesting, but i do not know if i want to put it in my engine 
http://burnfuelsmart.com/product.html
http://burnfuelsmart.com/product.html
Really makes me want to go get some.. especially with kids in the house.:fish:Bio MPG/Emission Improver contains naphthalene as an active ingredient. Short term exposure, inhalation, ingestion, or dermal contact with naphthalene is associated with hemolytic anemia, damage to the liver, and neurological damage